78M6631 three-phase power measurement and monitoring system chip

　　The 78M6631 is a highly integrated, 3-phase power measurement and monitoring system-on-chip with a 10MHz, 8051-compatible microcontroller core and Teridian's Single Converter Technology® containing a 22-bit delta-sigma converter and 32-bit Compute Engine (CE) ). The 78M6631 is specifically designed for a variety of applications requiring 3-phase power and quality measurements. It supports both delta and "wye" configurations. Measurement interfaces, the device provides an interface for current and voltage sensors including three differential current and three voltage 6 analog inputs. Integrated microprocessor core and 128KB of flash memory Configuration, post-processing, and data formatting are provided with a flexible means of connecting to the host processor via UART or SPI™ interfaces, or using LED or relay controlled DIO pins. All firmware is preloaded for testing during manufacturing.

　　Key Features

　　Watt's 2000:1 current range and <0.5% over temperature accuracy

　　Exceeds IEC 62053/ANSI C12.20 standards

　　Reference voltage <40 PPM/°C

　　6. Analog input that supports 3-phase voltage and current measurement inputs

　　pin or configured via bidirectional selector delta or wai

　　22-bit delta-sigma ADC with independent 32-bit compute engine (CE)

　　8-bit MPU (80515), instructions per clock cycle with 4KB microprocessor XRAM

　　128KB Flash Memory and Security

　　32kHz hardware watchdog timer time base

　　UART, IC², high-speed slave SPI host interface options

　　17 general-purpose 5V fault-tolerant I/O pins

　　Packaged in RoHS compliant (6/6) lead-free 56-pin TQFN

　　Application firmware (per phase):

　　Calculation of true effective value voltage and current

　　Active, reactive, apparent, fundamental and harmonic power calculations

　　Fundamental and harmonic current and voltage calculations

　　Calculation of line frequency and power factor

　　Phase compensation (± 18° at 60Hz)

　　Built-in calibration routine

　　Programmable alarm threshold

　　Command line (UART) communication

　　High-speed SPI communication